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## Discounted Cash Flow Valuation (Formulas)

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**Chapter**Six Discounted Cash Flow Valuation(Formulas)**Key Concepts and Skills**• Be able to compute the future value of multiple cash flows • Be able to compute the present value of multiple cash flows • Be able to compute loan payments • Be able to find the interest rate on a loan • Understand how loans are amortized or paid off • Understand how interest rates are quoted**Chapter Outline**• Future and Present Values of Multiple Cash Flows • Valuing Level Cash Flows: Annuities and Perpetuities • Comparing Rates: The Effect of Compounding Periods • Loan Types and Loan Amortization**Multiple Cash Flows –Future Value Example 6.1**• Find the value at year 3 of each cash flow and add them together. • Today (year 0): FV = 7000(1.08)3 = 8,817.98 • Year 1: FV = 4,000(1.08)2 = 4,665.60 • Year 2: FV = 4,000(1.08) = 4,320 • Year 3: value = 4,000 • Total value in 3 years = 8817.98 + 4665.60 + 4320 + 4000 = 21,803.58 • Value at year 4 = 21,803.58(1.08) = 23,547.87**Multiple Cash Flows – FV Example 2**• Suppose you invest $500 in a mutual fund today and $600 in one year. If the fund pays 9% annually, how much will you have in two years? • FV = 500(1.09)2 + 600(1.09) = 1248.05**Multiple Cash Flows – Example 2 Continued**• How much will you have in 5 years if you make no further deposits? • First way: • FV = 500(1.09)5 + 600(1.09)4 = 1616.26 • Second way – use value at year 2: • FV = 1248.05(1.09)3 = 1616.26**Multiple Cash Flows – FV Example 3**• Suppose you plan to deposit $100 into an account in one year and $300 into the account in three years. How much will be in the account in five years if the interest rate is 8%? • FV = 100(1.08)4 + 300(1.08)2 = 136.05 + 349.92 = 485.97**Multiple Cash Flows – Present Value Example 6.3**• Find the PV of each cash flows and add them • Year 1 CF: 200 / (1.12)1 = 178.57 • Year 2 CF: 400 / (1.12)2 = 318.88 • Year 3 CF: 600 / (1.12)3 = 427.07 • Year 4 CF: 800 / (1.12)4 = 508.41 • Total PV = 178.57 + 318.88 + 427.07 + 508.41 = 1432.93**0**1 2 3 4 200 400 600 800 178.57 318.88 427.07 508.41 1432.93 Example 6.3 Timeline**Multiple Cash Flows Using a Spreadsheet**• You can use the PV or FV functions in Excel to find the present value or future value of a set of cash flows • Setting the data up is half the battle – if it is set up properly, then you can just copy the formulas • Click on the Excel icon for an example**Multiple Cash Flows – PV Another Example**• You are considering an investment that will pay you $1000 in one year, $2000 in two years and $3000 in three years. If you want to earn 10% on your money, how much would you be willing to pay? • PV = 1000 / (1.1)1 = 909.09 • PV = 2000 / (1.1)2 = 1652.89 • PV = 3000 / (1.1)3 = 2253.94 • PV = 909.09 + 1652.89 + 2253.94 = 4815.93**Multiple Uneven Cash Flows – Usingthe Calculator**• Another way to use the financial calculator for uneven cash flows is to use the cash flow keys • Texas Instruments BA-II Plus • Press CF and enter the cash flows beginning with year 0. • You have to press the “Enter” key for each cash flow • Use the down arrow key to move to the next cash flow • The “F” is the number of times a given cash flow occurs in consecutive years • Use the NPV key to compute the present value by entering the interest rate for I, pressing the down arrow and then compute • Clear the cash flow keys by pressing CF and then CLR Work**Decisions, Decisions**• Your broker calls you and tells you that he has this great investment opportunity. If you invest $100 today, you will receive $40 in one year and $75 in two years. If you require a 15% return on investments of this risk, should you take the investment? • Use the CF keys to compute the value of the investment • CF; CF0 = 0; C01 = 40; F01 = 1; C02 = 75; F02 = 1 • NPV; I = 15; CPT NPV = 91.49 • No – the broker is charging more than you would be willing to pay.**Saving For Retirement**• You are offered the opportunity to put some money away for retirement. You will receive five annual payments of $25,000 each beginning in 40 years. How much would you be willing to invest today if you desire an interest rate of 12%? • Use cash flow keys: • CF; CF0 = 0; C01 = 0; F01 = 39; C02 = 25000; F02 = 5; NPV; I = 12; CPT NPV = 1084.71**Saving For Retirement Timeline**0 1 2 … 39 40 41 42 43 44 0 0 0 … 0 25K 25K 25K 25K 25K Notice that the year 0 cash flow = 0 (CF0 = 0) The cash flows years 1 – 39 are 0 (C01 = 0; F01 = 39) The cash flows years 40 – 44 are 25,000 (C02 = 25,000; F02 = 5)**Quick Quiz – Part I**• Suppose you are looking at the following possible cash flows: Year 1 CF = $100; Years 2 and 3 CFs = $200; Years 4 and 5 CFs = $300. The required discount rate is 7% • What is the value of the cash flows at year 5? • What is the value of the cash flows today? • What is the value of the cash flows at year 3?**Annuities and Perpetuities Defined**• Annuity – finite series of equal payments that occur at regular intervals • If the first payment occurs at the end of the period, it is called an ordinary annuity • If the first payment occurs at the beginning of the period, it is called an annuity due • Perpetuity – infinite series of equal payments**Annuities and Perpetuities – Basic Formulas**• Perpetuity: PV = C / r • Annuities:**Annuities and the Calculator**• You can use the PMT key on the calculator for the equal payment • The sign convention still holds • Ordinary annuity versus annuity due • You can switch your calculator between the two types by using the 2nd BGN 2nd Set on the TI BA-II Plus • If you see “BGN” or “Begin” in the display of your calculator, you have it set for an annuity due • Most problems are ordinary annuities**Annuity – Example 6.5**• You borrow money TODAY so you need to compute the present value. • 48 N; 1 I/Y; -632 PMT; CPT PV = 23,999.54 ($24,000) • Formula:**Annuity – Sweepstakes Example**• Suppose you win the Publishers Clearinghouse $10 million sweepstakes. The money is paid in equal annual installments of $333,333.33 over 30 years. If the appropriate discount rate is 5%, how much is the sweepstakes actually worth today? • PV = 333,333.33[1 – 1/1.0530] / .05 = 5,124,150.29**Buying a House**• You are ready to buy a house and you have $20,000 for a down payment and closing costs. Closing costs are estimated to be 4% of the loan value. You have an annual salary of $36,000 and the bank is willing to allow your monthly mortgage payment to be equal to 28% of your monthly income. The interest rate on the loan is 6% per year with monthly compounding (.5% per month) for a 30-year fixed rate loan. How much money will the bank loan you? How much can you offer for the house?**Buying a House - Continued**• Bank loan • Monthly income = 36,000 / 12 = 3,000 • Maximum payment = .28(3,000) = 840 • PV = 840[1 – 1/1.005360] / .005 = 140,105 • Total Price • Closing costs = .04(140,105) = 5,604 • Down payment = 20,000 – 5604 = 14,396 • Total Price = 140,105 + 14,396 = 154,501**Annuities on the Spreadsheet - Example**• The present value and future value formulas in a spreadsheet include a place for annuity payments • Click on the Excel icon to see an example**Quick Quiz – Part II**• You know the payment amount for a loan and you want to know how much was borrowed. Do you compute a present value or a future value? • You want to receive 5000 per month in retirement. If you can earn .75% per month and you expect to need the income for 25 years, how much do you need to have in your account at retirement?**Finding the Payment**• Suppose you want to borrow $20,000 for a new car. You can borrow at 8% per year, compounded monthly (8/12 = .66667% per month). If you take a 4 year loan, what is your monthly payment? • 20,000 = C[1 – 1 / 1.006666748] / .0066667 • C = 488.26**Finding the Payment on a Spreadsheet**• Another TVM formula that can be found in a spreadsheet is the payment formula • PMT(rate,nper,pv,fv) • The same sign convention holds as for the PV and FV formulas • Click on the Excel icon for an example**Finding the Number of Payments – Example 6.6**• Start with the equation and remember your logs. • 1000 = 20(1 – 1/1.015t) / .015 • .75 = 1 – 1 / 1.015t • 1 / 1.015t = .25 • 1 / .25 = 1.015t • t = ln(1/.25) / ln(1.015) = 93.111 months = 7.75 years • And this is only if you don’t charge anything more on the card!**Finding the Number of Payments – Another Example**• Suppose you borrow $2000 at 5% and you are going to make annual payments of $734.42. How long before you pay off the loan? • 2000 = 734.42(1 – 1/1.05t) / .05 • .136161869 = 1 – 1/1.05t • 1/1.05t = .863838131 • 1.157624287 = 1.05t • t = ln(1.157624287) / ln(1.05) = 3 years**Finding the Rate**• Suppose you borrow $10,000 from your parents to buy a car. You agree to pay $207.58 per month for 60 months. What is the monthly interest rate? • Sign convention matters!!! • 60 N • 10,000 PV • -207.58 PMT • CPT I/Y = .75%**Annuity – Finding the Rate Without aFinancial Calculator**• Trial and Error Process • Choose an interest rate and compute the PV of the payments based on this rate • Compare the computed PV with the actual loan amount • If the computed PV > loan amount, then the interest rate is too low • If the computed PV < loan amount, then the interest rate is too high • Adjust the rate and repeat the process until the computed PV and the loan amount are equal**Quick Quiz – Part III**• You want to receive $5000 per month for the next 5 years. How much would you need to deposit today if you can earn .75% per month? • What monthly rate would you need to earn if you only have $200,000 to deposit? • Suppose you have $200,000 to deposit and can earn .75% per month. • How many months could you receive the $5000 payment? • How much could you receive every month for 5 years?**Future Values for Annuities**• Suppose you begin saving for your retirement by depositing $2000 per year in an IRA. If the interest rate is 7.5%, how much will you have in 40 years? • FV = 2000(1.07540 – 1)/.075 = 454,513.04**Annuity Due**• You are saving for a new house and you put $10,000 per year in an account paying 8%. The first payment is made today. How much will you have at the end of 3 years? • FV = 10,000[(1.083 – 1) / .08](1.08) = 35,061.12**0 1 2 3**10000 10000 10000 32,464 Annuity Due Timeline 35,016.12**Perpetuity – Example 6.7**• Perpetuity formula: PV = C / r • Current required return: • 40 = 1 / r • r = .025 or 2.5% per quarter • Dividend for new preferred: • 100 = C / .025 • C = 2.50 per quarter**Quick Quiz – Part IV**• You want to have $1 million to use for retirement in 35 years. If you can earn 1% per month, how much do you need to deposit on a monthly basis if the first payment is made in one month? • What if the first payment is made today? • You are considering preferred stock that pays a quarterly dividend of $1.50. If your desired return is 3% per quarter, how much would you be willing to pay?**Work the Web Example**• Another online financial calculator can be found at MoneyChimp • Click on the web surfer and work the following example • Choose calculator and then annuity • You just inherited $5 million. If you can earn 6% on your money, how much can you withdraw each year for the next 40 years? • Datachimp assumes annuity due!!! • Payment = $313,497.81**Effective Annual Rate (EAR)**• This is the actual rate paid (or received) after accounting for compounding that occurs during the year • If you want to compare two alternative investments with different compounding periods you need to compute the EAR and use that for comparison.**Annual Percentage Rate**• This is the annual rate that is quoted by law • By definition APR = period rate times the number of periods per year • Consequently, to get the period rate we rearrange the APR equation: • Period rate = APR / number of periods per year • You should NEVER divide the effective rate by the number of periods per year – it will NOT give you the period rate**Computing APRs**• What is the APR if the monthly rate is .5%? • .5(12) = 6% • What is the APR if the semiannual rate is .5%? • .5(2) = 1% • What is the monthly rate if the APR is 12% with monthly compounding? • 12 / 12 = 1% • Can you divide the above APR by 2 to get the semiannual rate? NO!!! You need an APR based on semiannual compounding to find the semiannual rate.**Things to Remember**• You ALWAYS need to make sure that the interest rate and the time period match. • If you are looking at annual periods, you need an annual rate. • If you are looking at monthly periods, you need a monthly rate. • If you have an APR based on monthly compounding, you have to use monthly periods for lump sums, or adjust the interest rate appropriately if you have payments other than monthly**Computing EARs - Example**• Suppose you can earn 1% per month on $1 invested today. • What is the APR? 1(12) = 12% • How much are you effectively earning? • FV = 1(1.01)12 = 1.1268 • Rate = (1.1268 – 1) / 1 = .1268 = 12.68% • Suppose if you put it in another account, you earn 3% per quarter. • What is the APR? 3(4) = 12% • How much are you effectively earning? • FV = 1(1.03)4 = 1.1255 • Rate = (1.1255 – 1) / 1 = .1255 = 12.55%**EAR - Formula**Remember that the APR is the quoted rate**Decisions, Decisions II**• You are looking at two savings accounts. One pays 5.25%, with daily compounding. The other pays 5.3% with semiannual compounding. Which account should you use? • First account: • EAR = (1 + .0525/365)365 – 1 = 5.39% • Second account: • EAR = (1 + .053/2)2 – 1 = 5.37% • Which account should you choose and why?**Decisions, Decisions II Continued**• Let’s verify the choice. Suppose you invest $100 in each account. How much will you have in each account in one year? • First Account: • Daily rate = .0525 / 365 = .00014383562 • FV = 100(1.00014383562)365 = 105.39 • Second Account: • Semiannual rate = .0539 / 2 = .0265 • FV = 100(1.0265)2 = 105.37 • You have more money in the first account.**Computing APRs from EARs**• If you have an effective rate, how can you compute the APR? Rearrange the EAR equation and you get:**APR - Example**• Suppose you want to earn an effective rate of 12% and you are looking at an account that compounds on a monthly basis. What APR must they pay?**Computing Payments with APRs**• Suppose you want to buy a new computer system and the store is willing to sell it to allow you to make monthly payments. The entire computer system costs $3500. The loan period is for 2 years and the interest rate is 16.9% with monthly compounding. What is your monthly payment? • Monthly rate = .169 / 12 = .01408333333 • Number of months = 2(12) = 24 • 3500 = C[1 – 1 / 1.01408333333)24] / .01408333333 • C = 172.88